Extensions of the Axiom of Blackwell Determinacy Benedikt Löwe Abstract: We define extensions of the Axiom of Blackwell Determinacy in analogy to extensions of the Axiom of Determinacy. We prove that the Axiom of Real Blackwell Determinacy is strictly stronger than the Axiom of Blackwell Determinacy, and show that several strong variants of Blackwell determinacy are inconsistent (as is known for their perfect information analogues). Keywords: Blackwell determinacy; von Neumann Minimax Theorem; Axiom of Choice